External 3PE anti-corrosion steel pipe and internal IPN8710 anti-corrosion steel pipe manufacturer for water transportation anti-corrosion pipeline

Description :

　　IPN8710 anti-corrosion steel pipe, as the name suggests, refers to the use of two anti-corrosion methods for steel pipes. 3PE anti-corrosion is used for the outside, and IPN8710 anti-corrosion is used for the inside, with a combination of the inside and outside. The 3PE anti-corrosion steel pipe coating, also known as the three-layer polyethylene anti-corrosion coating, is a new type of anti-corrosion steel pipe coating that cleverly combines the European 2PE anti-corrosion coating with the widely used epoxy powder anti-corrosion steel pipe coating (FBE) in North America. It has been recognized and used worldwide for over ten years. The coating for 3PE anti-corrosion is an epoxy powder anti-corrosion coating in contact with the steel pipe surface at the bottom layer, and a copolymer adhesive with branched functional groups in the middle layer. The surface layer is a high-density polyethylene anti-corrosion coating.

　　IPN8710-1: Composed of polyurethane polyethylene, modified epoxy resin, anti rust pigments and fillers, additives, etc., it solidifies at room temperature to form an interpenetrating network. The coating structure is dense, resistant to acid, alkali, salt, and has excellent anti rust performance and strong adhesion. There are many types of corrosive media in the water supply pipeline, including acids, alkalis, salts, oxidants, and water vapor. Coatings have chemical inertness and are resistant to acid, alkali, and salt corrosion. The coating should have a dense structure, good waterproof permeability, strong adhesion, and toughness.

　　IPN8710 drinking water specific coating has strong adhesion, high strength, abrasion resistance, hydrolysis resistance, corrosion resistance, water resistance, and excellent weather resistance. It is a new type of anti-corrosion coating with high solids and low viscosity. Suitable for long-term anti-corrosion coatings on the inner walls, steel structures, and concrete surfaces of various equipment and facilities such as petroleum, chemical, power, metallurgy, transportation, food, gas cabinets, pipelines, storage tanks, etc. It can also be used as anti-corrosion coatings for the inner and outer walls of buried pipelines and cooling tower inner walls. Cyanogen based anti-corrosion coatings belong to aromatic polyurethane and have superior chemical resistance, heat resistance, and radiation resistance. The coating has good physical and mechanical properties, high strength, wear resistance, and luster, excellent anti-corrosion performance. The coating is resistant to oil, alkali, acid, salt, and industrial waste gas, mainly used for anti-corrosion of concrete surfaces, chemical equipment, pipelines, oil tanks, as well as facilities or equipment such as water gates, dams, docks, mines, etc.

　　Structural characteristics of using external 3PE and internal IPN8710 anti-corrosion steel pipe:

　　(1) It has excellent corrosion resistance and does not require cathodic protection or other anti-corrosion measures, and will not cause secondary pollution to water and other media. The product has a long service life.

　　(2) The weight of lightweight pipelines accounts for only 1:4 of ductile iron pipes of the same specifications and length, and 1:10 of cement pipes. Convenient transportation, loading and unloading, and easy installation.

　　(3) The long length of a single pipeline reduces pipeline joints, accelerates installation speed, and improves the overall quality of the pipeline. After rust removal, the steel surface of IPN8710 drinking water anti-corrosion steel pipe should be coated with primer within 16 hours, and in humid and coastal areas, it should be coated with primer within 8 hours. Otherwise, if secondary rust occurs, it must be treated with a wire brush.

　　(4) Smooth inner wall of the pipe reduces flow resistance, increases flow velocity, and reduces energy consumption. Transporting fluid of the same flow rate through smaller diameter pipelines can increase the flow rate by about 10% compared to steel pipes of the same specification; No scaling, long-term use does not reduce flow rate. The protection of cables in disturbed and heavily corroded environments has good effects.

　　To slow down or prevent the corrosion and deterioration of pipelines under the chemical and electrochemical action of external media or the metabolic activity of microorganisms, 2 or 3 layers of polyethylene (3PE) are coated on their outer walls to achieve pipeline anti-corrosion. The service life of 3PE anti-corrosion pipes is extended by 3-5 times. The bottom layer is fusion bonded epoxy (≥ 80 μ m); The middle layer is adhesive (170-250 μ m); The surface layer is extruded polyethylene (about 2mm). The total thickness of the protective layer is about 1.8-3.7mm. In the three-layer structure, the main function of the fusion bonded epoxy powder coating is to form a continuous coating film, which is directly bonded to the surface of the steel pipe and has good chemical corrosion resistance and cathodic stripping resistance; Reacts with the active groups of the intermediate layer adhesive to form a chemical bond, ensuring that the overall anti-corrosion layer has good adhesion at higher temperatures. The intermediate layer is usually a copolymer adhesive, which is mainly composed of polyolefin. Currently, ethylene based copolymer adhesives are widely used. The polar functional groups of the copolymer adhesive can react with the epoxy groups of the fusion bonded epoxy powder coating to form hydrogen bonds or chemical bonds, forming a good bond between the intermediate layer and the bottom layer; The non-polar ethylene portion has a good affinity with the surface layer polyethylene, so the intermediate layer also has good bonding performance with the surface layer. The main function of polyethylene surface layer is to provide mechanical protection and anti-corrosion, which is the same as the traditional two-layer structure polyethylene anti-corrosion layer.

　　The external 3PE internal IPN8710 anti-corrosion steel pipe is used for pipeline urban and rural water transportation. The IPN8710 anti-corrosion steel pipe is used in different working environments to slow down or prevent the pipeline from being eroded and deteriorated by the chemical and electrochemical action of the external medium or the metabolic activity of microorganisms. Two or three layers of polyethylene (3PE) are coated on its outer wall to achieve pipeline anti-corrosion, and the service life of the 3PE anti-corrosion pipe is extended by 3-5 times. The bottom layer is fusion bonded epoxy (≥ 80 μ m); The middle layer is adhesive (170-250 μ m); The surface layer is extruded polyethylene (about 2mm). The total thickness of the protective layer is about 1.8-3.7mm. In the three-layer structure, the main function of the fusion bonded epoxy powder coating is to form a continuous coating film, which is directly bonded to the surface of the steel pipe and has good chemical corrosion resistance and cathodic stripping resistance; Reacts with the active groups of the intermediate layer adhesive to form a chemical bond, ensuring that the overall anti-corrosion layer has good adhesion at higher temperatures. The intermediate layer is usually a copolymer adhesive, which is mainly composed of polyolefin. Currently, ethylene based copolymer adhesives are widely used. The polar functional groups of the copolymer adhesive can react with the epoxy groups of the fusion bonded epoxy powder coating to form hydrogen bonds or chemical bonds, forming a good bond between the intermediate layer and the bottom layer; The non-polar ethylene portion has a good affinity with the surface layer polyethylene, so the intermediate layer also has good bonding performance with the surface layer. The main function of polyethylene surface layer is to provide mechanical protection and anti-corrosion, which is the same as the traditional two-layer structure polyethylene anti-corrosion layer.

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